[EDDIE T]

procharged stage2
p0171- lean bank 1
p0300- multiple cylinder misfire
p.s the map im running is very conservative until the weather breaks in march when i can get it dyno tuned. the question is do i have to worry about p0171

 

[RICHSRT8]

procharged stage2
p0171- lean bank 1
p0300- multiple cylinder misfire
p.s the map im running is very conservative until the weather breaks in march when i can get it dyno tuned. the question is do i have to worry about p0171

You don't want to run too lean,could cause engine damage under load.Sounds like the tune needs adjustment,probably causing both codes.

 

[EDDIE T]

my thoughts exactly. thanks

 

[spookyfish]

I would definitely be concerned, if you have a predator or some form of datalogging, check for knock, too.